Hello Mrs Hill from Arkansas...When you paint DMSO + aloe vera onto your skin it is a unique characteristic of DMSO that it will transport the aloe vera through the skin transdermally and into the blood. DMSO is able to do this by increasing the porosity or permeability of the individual skin cells which are then able to allow passage of the aloe vera through the skin cells as well. It is this sudden increase in skin porosity or permeability that causes the warm feeling on your skin which is nothing to worry about and is entirely normal when using DMSO topically.
When you paint the DMSO and aloe vera onto your skin, make sure that this area is not sopping wet with DMSO +aloe vera. All you need is a thin damp layer painted onto the skin for best effect.
There is also no reason why you shouldn't use the DMSO in a sprayer. But please be aware that DMSO can dissolve some plastics. So if you're not sure then perhaps best to use a glass sprayer. So using colloidal silver and DMSO in a glass sprayer should be fine.